TY - JOUR
T1 - Alkali-metal adsorption on dissimilar alkali-metal monolayers preadsorbed on Cu(001)
T2 - Li on Na and Na on Li
AU - Mizuno, Seigi
AU - Tochihara, Hiroshi
AU - Kawamura, Takaaki
PY - 1994/1/1
Y1 - 1994/1/1
N2 - An adsorption system of metal-on-metal growth is presented. The adsorption of alkali-metal atoms on monolayers of dissimilar alkali metals preadsorbed on the Cu(001) surface has been studied by Auger-electron spectroscopy, work-function change, and low-energy electron-diffraction intensity analysis. We have examined the following three adsorption systems on Cu(001) at 180 K; Na on a full monolayer of Li, Li on a full monolayer of Na, and Na on a submonolayer of Li, namely, the c(2×2) structure of Li adatoms. It is found that a simple overlayer formation of Na takes place on the full Li monolayer, while Li atoms substitute Na adatoms for Li adsorption on the full Na monolayer. For adsorption of Na on the Li-c(2×2) structure whose coverage is 5/8 of the full Li monolayer, it is found that Na atoms compress the Li adlayer to become denser monolayers. The Na atoms do not intermix with Li adatoms, but they form islands of the c(2×2) structure on Cu(001).
AB - An adsorption system of metal-on-metal growth is presented. The adsorption of alkali-metal atoms on monolayers of dissimilar alkali metals preadsorbed on the Cu(001) surface has been studied by Auger-electron spectroscopy, work-function change, and low-energy electron-diffraction intensity analysis. We have examined the following three adsorption systems on Cu(001) at 180 K; Na on a full monolayer of Li, Li on a full monolayer of Na, and Na on a submonolayer of Li, namely, the c(2×2) structure of Li adatoms. It is found that a simple overlayer formation of Na takes place on the full Li monolayer, while Li atoms substitute Na adatoms for Li adsorption on the full Na monolayer. For adsorption of Na on the Li-c(2×2) structure whose coverage is 5/8 of the full Li monolayer, it is found that Na atoms compress the Li adlayer to become denser monolayers. The Na atoms do not intermix with Li adatoms, but they form islands of the c(2×2) structure on Cu(001).
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U2 - 10.1103/PhysRevB.50.17540
DO - 10.1103/PhysRevB.50.17540
M3 - Article
AN - SCOPUS:0000772192
SN - 0163-1829
VL - 50
SP - 17540
EP - 17546
JO - Physical Review B
JF - Physical Review B
IS - 23
ER -